Spasics

psychogenic·spasics·hardware/TTExperimentModule/TTExperimentModule.kicad_pcb

About the Spasics PCB

Spasics is an open source RP2040/RP2350 PCB design by psychogenic, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 45 × 30 mm, with 66 components from 24 distinct parts.

Its main chip is the SC0914(13), from the RP2040/RP2350 family. Other key parts include the 74CBTLV3257PW,118, AP2112K-1.8TRG1, AP2112K-3.3TRG1, Openframe_QFN_TT06_REV2 and W25Q32JVSSIQ. By type, the board carries 35 capacitors, 17 resistors, 6 ICs, 5 connectors, 2 inductors and 1 crystal.

From the project

Scratch repo for work, thoughts and notes about the spasics project: sending an ASIC to space!

A single PCB created to host both the ASIC and the platform for the Experiment Run and Data Collection Framework (an RP2040) for inclusion within the pocketQube class satellite.

In addition to the meeting requirements related to being included in the launch (e.g. a 3mm height maximum, no silk screen, etc), a primary goals were to

* provide a seamless path to running SDK and existing ASIC project code with minimal disruption; and

Spasics, from the project README — From the project README

Main components on the Spasics

74CBTLV3257PW,118 AP2112K-1.8TRG1 AP2112K-3.3TRG1 Openframe_QFN_TT06_REV2 SC0914(13)W25Q32JVSSIQ

Spasics bill of materials (BOM)

66 components, 24 distinct parts.

Qty	Part	Footprint	Refs
1	74CBTLV3257PW,118 74CBTLV3257	TSSOP-16_4.4x5mm_P0.65mm	U1
1	AP2112K-1.8TRG1 AP2112K-1.8	SOT-23-5	U2
1	AP2112K-3.3TRG1 AP2112K-3.3	SOT-23-5	U3
1	Openframe_QFN_TT06_REV2	QFN-64-1EP_9x9mm_P0.5mm_EP7.65x7.65mm	U4
1	SC0914(13) RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U5
1	W25Q32JVSSIQ W25Q32JVSS	SOIC-8_5.3x5.3mm_P1.27mm	U6
1	830108206909 12.0MHz	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	Conn_01x03	PinHeader_1x03_P1.27mm_Vertical	J1
1	Conn_01x02	PinHeader_1x02_P2.54mm_Vertical	J2
1	5050700622	CONN_505070-0622_MOL	J3
1	Conn_01x04	PinHeader_1x04_P1.27mm_Vertical	J5
1	Conn_01x02	PinHeader_1x02_P1.27mm_Vertical	J6
2	BLM18KG601BH1D FerriteBead_Small	L_0603_1608Metric	FB1, FB2
2	GRM21BR71C106KE51L 10uF	C_0805_2012Metric	C1, C5
4	CL10A105KA8NNNC 1uF	C_0603_1608Metric	C2, C6, C27, C28
12	CL05A104KA5NNNC 100nF	C_0402_1005Metric	C3, C4, C7, C31, C32, C33, C34, C35 +4
5	GRT188R61H105KE13D C_1u_0603_50V	C_0603_1608Metric	C8, C12, C14, C15, C16
10	CL05A104KA5NNNC 0.1uf	C_0402_1005Metric	C17, C18, C19, C20, C21, C22, C23, C24 +2
2	CC0402BRNPO9BN6R0 6pF	C_0402_1005Metric	C29, C30
11	RC0402FR-0710KL 10k	R_0402_1005Metric	R1, R2, R3, R4, R5, R13, R15, R16 +3

Show 4 more

Qty	Part	Footprint	Refs
2	CR0402-FX-1001GLF 1k	R_0402_1005Metric	R6, R14
2	RMCF1206ZG0R00 0R	R_1206_3216Metric	R7, R8
1	1k	R_0805_2012Metric	R9
1	ERJ-H2GJ102X 1k	R_0402_1005Metric	R11

Spasics design files

The KiCad project lives in the psychogenic/spasics repository on GitHub; these links point at the commit this page was built from.

Spasics: common questions

What microcontroller does the Spasics use?

The Spasics is built around the SC0914(13), from the RP2040/RP2350 family.

How big is the Spasics PCB?

The Spasics measures 45 × 30 mm, has 4 copper layers and is 0.926 mm thick.

How many components are on the Spasics?

66 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the Spasics design files?

From the psychogenic/spasics repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Spasics design in my own project?

Yes, under the terms of its GPL-3.0 license, which psychogenic chose for the repository.

Can I test firmware for the Spasics without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.